Cathedral carved out of salt, located a mile below the earth's surface.

A little known Colombian theme park of giant curiosities.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

A celebration of Colombia’s premier contemporary artist.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

There must be a pun in this haystack somewhere...

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Scattered around Atlanta are little doors with big charm.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

100 massive sculptures in the Hudson River Valley.

A hundred copies of Antony Gormley's naked body stare out across the water.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

The Liverpool street made famous by the Beatles is real.